I received the Comply Tx500 and Tsx500 tips for the M200's and the Tx tips didn't work out so well for me. I can't seem to get a good fit with those. The Tsx tips on the other hand work the best I've encountered so far with the M200's. The cylindrical shape of the tips just fit much better for me. As for the sound, it is muffled a little bit but for me the comfort is worth it.
I also received the Sony XBA-H1 today and first impressions are that it isn't bass heavy and doesn't reach down very low. I hear more mid-bass right now. The vocals are very forward. Almost too forward. Treble is sparkly and almost slightly peaky. Depth of sound is very impressive and works amazingly well with Jazz and string instruments. I've tried it out with my iPone 5 and Yulong D100 MK2 and amping it with this dac/amp really didn't help it much. I'll try it out with the DX50 after a few hours of burn.